RouterOS force request web of client on single site?

RouterOS Scripting
1

Hi all,
I have the need to force the request web of a pppoe client on a single site (captival portal), is it possible? is possible using script commands with snmp?

2

capture all request, or only first one?

3

capture all request

4

so just dst-NAT all requests with dst-port 80 to your web server